| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 543 | 
                                                                 
                                    
                                    45%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 134 | 
                                                                 
                                    
                                    11.1%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 229 | 
                                                                 
                                    
                                    19%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 213 | 
                                                                 
                                    
                                    17.6%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 87 | 
                                                                 
                                    
                                    7.2%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 2 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 998 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |